期刊
BIORESOURCE TECHNOLOGY
卷 121, 期 -, 页码 76-82出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2012.07.012
关键词
Microalgae; pH adjustment; Wastewater; Biofuel; gamma-Aminobutyric acid
资金
- National Program on Key Basic Research Project of China (973 Program) [2011CB200905]
- Ministry of Science and Technology, PR China [2011BAD14B03]
- Natural Science Foundation of Guangdong Province, China [10451007006006001]
Cultivation of Chlorella zofingiensis and nutrients removal in dairy wastewater were investigated in bench-scale outdoor ponds in winter, South China. The impacts of the two types of pH regulations, 5 similar to 6% CO2 and acetic acid (HAc) on this process were studied. After 6 days cultivation, the removal rates of total nitrogen (TN) and orthophosphate (PO43-) using CO2 regulation were better than those using HAc. The removal rates of PO43- and TN were 97.5% and 51.7%, respectively using CO2 regulation; 79.6% (TN) and 42.0% (PO43-) were obtained using HAc regulation. Higher biomass, protein, sugar content, and stable pH control were found using CO2 regulation. However, significantly higher lipid content (31.8%) was observed using HAc regulation. The dominant differences of fatty acids were the content of C18:1 and C18:3. The growth characteristics and environmental conditions especially during the typical logarithmic phase were also analyzed. (C) 2012 Elsevier Ltd. All rights reserved.
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